[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"verticals":3,"playground-nuxt-weekly-usesession-sealed-sessions":44,"search-suggestions":58},[4,20,32],{"id":5,"slug":6,"name":7,"tagline":8,"description":9,"accentFrom":10,"accentTo":11,"icon":12,"defaultLocale":13,"locales":14,"features":16,"position":19},"019fe637-3d33-714b-b57f-23e163ffca0c","dev","Web Development","Read it. Run it. Prove it.","A post a day on modern web development — most with an editable playground and a quiz that explains every answer. Free, no account needed.","violet-500","cyan-400","◇","en",[13,15],"fa",{"courses":17,"paths":17,"articles":17,"exams":18,"flashcards":18,"packages":17,"community":17,"certificates":17,"teams":17,"commerce":17},true,false,0,{"id":21,"slug":22,"name":23,"tagline":24,"description":25,"accentFrom":26,"accentTo":10,"icon":27,"defaultLocale":13,"locales":28,"features":30,"position":31},"019fe637-3dc2-754c-8657-0f175bfee7c6","lang","Languages","Learn a language the way you learn a codebase.","Grammar explained the way good documentation explains an API — one idea at a time, each with a quiz.","amber-400","⌘",[13,15,29],"es",{"courses":18,"paths":18,"articles":17,"exams":18,"flashcards":17,"packages":18,"community":17,"certificates":17,"teams":18,"commerce":18},2,{"id":33,"slug":34,"name":35,"tagline":36,"description":37,"accentFrom":38,"accentTo":39,"icon":40,"defaultLocale":13,"locales":41,"features":42,"position":43},"7b3c16f2-931d-410e-802e-e1fa4edab7de","soft","Soft Skills","The half of the job nobody wrote documentation for.","Weekly, on the parts of working life that decide more than your code does — first weeks, meetings, interviews, promotions, and the people around you. Written from what actually happens, and recorded as a podcast you can listen to on the walk.","emerald-400","teal-300","◉",[13],{"courses":18,"paths":18,"articles":17,"exams":18,"flashcards":18,"packages":18,"community":17,"certificates":18,"teams":18,"commerce":18},3,{"slug":45,"title":46,"summary":47,"html":48,"css":49,"js":50,"config":51,"doc":53},"nuxt-weekly-usesession-sealed-sessions","Nuxt useSession — seal, tamper & wrong-secret playground",null,"\u003Cdiv class=\"pg\">\n    \u003Ch1 class=\"pg-title\">🎮 Seal, unseal, tamper: how \u003Ccode>useSession\u003C\u002Fcode> actually protects data\u003C\u002Fh1>\n    \u003Cp class=\"pg-sub\">\n      A model of the mechanism — not a real Nuxt server. The point it proves is real:\n      a sealed session cookie can only be \u003Cb>opened\u003C\u002Fb> with the secret that sealed it, and\n      editing even one character makes it fail to open at all, instead of quietly forging new data.\n    \u003C\u002Fp>\n    \u003Cdiv class=\"banner info show\">\n      Modeled sealing — this page uses a tiny toy checksum to stand in for the real\n      authenticated-encryption format (\u003Ccode>iron\u003C\u002Fcode>, via \u003Ccode>h3\u003C\u002Fcode>) that Nuxt's\n      \u003Ccode>useSession\u003C\u002Fcode> actually uses. The lesson (tamper → rejected, wrong secret → rejected)\n      is the same either way.\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel-label\" style=\"margin-top:16px\">\u003Cspan class=\"n\">1\u003C\u002Fspan> Pick what to try\u003C\u002Fdiv>\n    \u003Cdiv class=\"seg\" id=\"tabSeg\">\n      \u003Cbutton type=\"button\" aria-pressed=\"true\" data-val=\"roundtrip\">Normal round trip\u003C\u002Fbutton>\n      \u003Cbutton type=\"button\" aria-pressed=\"false\" data-val=\"tamper\">Tamper with the cookie\u003C\u002Fbutton>\n      \u003Cbutton type=\"button\" aria-pressed=\"false\" data-val=\"secret\">Wrong secret\u003C\u002Fbutton>\n    \u003C\u002Fdiv>\n\n    \u003C!-- ROUND TRIP -->\n    \u003Cdiv class=\"panel\" id=\"tab-roundtrip\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Visit the page a few times\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" style=\"margin-top:0\">\n        Each click simulates a brand-new, unrelated HTTP request — the server has no memory of the\n        last one. The only thing that connects them is the cookie your \"browser\" sends back.\n      \u003C\u002Fp>\n      \u003Cdiv class=\"btn-row\">\n        \u003Cbutton class=\"btn primary\" id=\"visitBtn\">▶️ Send a request with this cookie\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn ghost\" id=\"resetBtn\">Reset (new visitor)\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"output\" style=\"margin-top:12px; display:flex; gap:24px; align-items:center; flex-wrap:wrap;\">\n        \u003Cdiv>\n          \u003Cdiv class=\"panel-label\" style=\"margin:0 0 4px\">\u003Cspan class=\"n\">visits\u003C\u002Fspan>\u003C\u002Fdiv>\n          \u003Cdiv class=\"visits-num\" id=\"visitsNum\">0\u003C\u002Fdiv>\n        \u003C\u002Fdiv>\n        \u003Cdiv style=\"flex:1; min-width:220px;\">\n          \u003Cdiv class=\"panel-label\" style=\"margin:0 0 4px\">cookie sent back to the browser\u003C\u002Fdiv>\n          \u003Cdiv class=\"cookie-box\" id=\"cookieBoxRT\">(none yet — click \"Send a request\")\u003C\u002Fdiv>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"status\" id=\"statusRT\" style=\"margin-top:12px;\">\n        \u003Cspan class=\"dot info\">\u003C\u002Fspan>\u003Cspan>No session cookie yet — the first request creates one.\u003C\u002Fspan>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003C!-- TAMPER -->\n    \u003Cdiv class=\"panel\" id=\"tab-tamper\" style=\"display:none;\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> A sealed cookie from a real session\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" style=\"margin-top:0\">\n        This cookie already says \u003Ccode>{ \"userId\": \"ada-01\" }\u003C\u002Fcode>. Flip one character in it — the way\n        a curious visitor poking at devtools might — and resend it.\n      \u003C\u002Fp>\n      \u003Cdiv class=\"cookie-box\" id=\"cookieBoxTamper\">\u003C\u002Fdiv>\n      \u003Cdiv class=\"btn-row\" style=\"margin-top:12px;\">\n        \u003Cbutton class=\"btn bad\" id=\"flipBtn\">✏️ Flip a character in the cookie\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn primary\" id=\"resendBtn\">▶️ Resend this cookie to the server\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn ghost\" id=\"resetTamperBtn\">Reset\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"output\" style=\"margin-top:12px;\">\n        \u003Cdiv class=\"log\" id=\"tamperLog\">Flip a character, then resend, and compare to resending it untouched.\u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003C!-- WRONG SECRET -->\n    \u003Cdiv class=\"panel\" id=\"tab-secret\" style=\"display:none;\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Two server instances, two secrets\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" style=\"margin-top:0\">\n        This cookie was sealed by a server whose \u003Ccode>NUXT_APP_SECRET\u003C\u002Fcode> is \u003Ccode>A\u003C\u002Fcode>. Pick which\n        server instance receives the next request — one shares the same secret, one doesn't (think: a\n        second instance deployed without the env var set, or a secret rotated without warning).\n      \u003C\u002Fp>\n      \u003Cdiv class=\"cookie-box\" id=\"cookieBoxSecret\" style=\"margin-bottom:12px;\">\u003C\u002Fdiv>\n      \u003Cdiv class=\"row\" style=\"gap:10px; align-items:flex-end; flex-wrap:wrap;\">\n        \u003Cdiv class=\"field\">\n          \u003Cspan class=\"ctl-label\">Receiving server's appSecret\u003C\u002Fspan>\n          \u003Cselect class=\"pg-select\" id=\"secretSelect\">\n            \u003Coption value=\"A\" selected>Secret A (same server that sealed it)\u003C\u002Foption>\n            \u003Coption value=\"B\">Secret B (a different instance \u002F rotated secret)\u003C\u002Foption>\n          \u003C\u002Fselect>\n        \u003C\u002Fdiv>\n        \u003Cbutton class=\"btn primary\" id=\"secretRun\">▶️ Unseal with this secret\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"output\" style=\"margin-top:12px;\">\n        \u003Cdiv class=\"log\" id=\"secretLog\">Pick a secret and try to unseal.\u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"hint\" style=\"margin-top:14px;\">\n      In all three tabs: a failed unseal is treated as \u003Cb>no session\u003C\u002Fb>, never as \"whatever the cookie\n      says.\" That's the actual security property — tampering doesn't let you forge a different\n      session, it just destroys the one you had.\n    \u003C\u002Fdiv>\n  \u003C\u002Fdiv>","\u002F*\n * Shared playground design system — daily-post\n * ============================================\n * Link it from any post's playground\u002Findex.html (no per-post boilerplate):\n *\n *   \u003Clink rel=\"stylesheet\" href=\"..\u002F..\u002F..\u002Fplayground\u002Fassets\u002Fbase.css\" \u002F>\n *\n * The relative path resolves the same locally (posts\u002F\u003Cbase>\u002Fplayground\u002F) and on\n * the deployed host (public\u002Fposts\u002F\u003Cbase>\u002Fplayground\u002F), because build-site.js\n * mirrors this file to public\u002Fplayground\u002Fassets\u002Fbase.css. For a CodeSandbox\n * --embed, playground.js inlines this file so the single-file sandbox still styles.\n *\n * Then write ONLY the demo-specific CSS in your inline \u003Cstyle>. Everything below\n * — tokens, layout, panels, buttons, toggles, sliders, code blocks, status\u002Flog,\n * banners, presets — comes for free and looks consistent across every post.\n *\n * Theme-aware: dark by default, light via prefers-color-scheme AND a\n * [data-theme] override on \u003Chtml> (so a toggle can force either). Accessible:\n * real focus rings, adequate contrast, reduced-motion honored.\n *\u002F\n\n\u002F* ---------- design tokens ---------- *\u002F\n:root {\n  --bg: #0d1117;\n  --bg-grid: #ffffff0a;\n  --panel: #161b22;\n  --panel-2: #0b0e14;\n  --card: #0b0e14;\n  --ink: #e8ebf2;\n  --muted: #9aa4b2;\n  --faint: #6b7688;\n  --line: #232a35;\n  --line-soft: #ffffff12;\n  --accent: #7c9cff;\n  --accent-ink: #0b0e14;\n  --good: #3fb950;\n  --warn: #f0883e;\n  --bad: #f85149;\n  --info: #58a6ff;\n  --radius: 14px;\n  --radius-sm: 9px;\n  --shadow: 0 8px 30px #0006;\n  --shadow-sm: 0 4px 14px #0005;\n  --mono: ui-monospace, SFMono-Regular, \"SF Mono\", Menlo, Consolas, \"Liberation Mono\", monospace;\n  --sans: ui-sans-serif, system-ui, -apple-system, \"Segoe UI\", Roboto, \"Helvetica Neue\", sans-serif;\n  color-scheme: dark;\n}\n\n\u002F* Light theme — system preference, overridable by [data-theme] on \u003Chtml>. *\u002F\n@media (prefers-color-scheme: light) {\n  :root:not([data-theme=\"dark\"]) {\n    --bg: #f4f6fb;\n    --bg-grid: #00000008;\n    --panel: #ffffff;\n    --panel-2: #f0f3f9;\n    --card: #f7f9fc;\n    --ink: #131722;\n    --muted: #5b6472;\n    --faint: #8a93a3;\n    --line: #e2e7f0;\n    --line-soft: #00000010;\n    --accent: #2f6df0;\n    --accent-ink: #ffffff;\n    --good: #1a7f37;\n    --warn: #bc4c00;\n    --bad: #cf222e;\n    --info: #0969da;\n    --shadow: 0 8px 30px #0000001f;\n    --shadow-sm: 0 4px 14px #00000014;\n    color-scheme: light;\n  }\n}\n:root[data-theme=\"light\"] {\n  --bg: #f4f6fb;\n  --bg-grid: #00000008;\n  --panel: #ffffff;\n  --panel-2: #f0f3f9;\n  --card: #f7f9fc;\n  --ink: #131722;\n  --muted: #5b6472;\n  --faint: #8a93a3;\n  --line: #e2e7f0;\n  --line-soft: #00000010;\n  --accent: #2f6df0;\n  --accent-ink: #ffffff;\n  --good: #1a7f37;\n  --warn: #bc4c00;\n  --bad: #cf222e;\n  --info: #0969da;\n  --shadow: 0 8px 30px #0000001f;\n  --shadow-sm: 0 4px 14px #00000014;\n  color-scheme: light;\n}\n\n\u002F* ---------- reset & base ---------- *\u002F\n*, *::before, *::after { box-sizing: border-box; }\n\nbody {\n  margin: 0;\n  min-height: 100vh;\n  font-family: var(--sans);\n  color: var(--ink);\n  background:\n    radial-gradient(circle at 1px 1px, var(--bg-grid) 1px, transparent 0) 0 0 \u002F 24px 24px,\n    var(--bg);\n  display: flex;\n  justify-content: center;\n  align-items: flex-start;\n  padding: clamp(14px, 3vw, 26px);\n  line-height: 1.55;\n  -webkit-font-smoothing: antialiased;\n  text-rendering: optimizeLegibility;\n}\n\n\u002F* The single content column. *\u002F\n.pg {\n  width: 100%;\n  max-width: 860px;\n}\n\n\u002F* ---------- header ---------- *\u002F\n.pg-title {\n  font-size: clamp(1.15rem, 1rem + 1vw, 1.4rem);\n  font-weight: 800;\n  letter-spacing: -0.02em;\n  margin: 0 0 4px;\n  display: flex;\n  align-items: center;\n  gap: 9px;\n}\n.pg-sub {\n  color: var(--muted);\n  font-size: 0.92rem;\n  line-height: 1.5;\n  margin: 0 0 16px;\n  max-width: 66ch;\n}\n.pg-sub strong, .pg-sub b { color: var(--ink); font-weight: 700; }\n.pg-sub code { font-family: var(--mono); background: var(--line-soft); color: var(--accent);\n  padding: 1px 6px; border-radius: 6px; font-size: 0.85em; }\n\n\u002F* ---------- panels ---------- *\u002F\n.panel {\n  background: var(--panel);\n  border: 1px solid var(--line);\n  border-radius: var(--radius);\n  padding: 16px 18px;\n  margin-bottom: 14px;\n  box-shadow: var(--shadow-sm);\n}\n.panel-label {\n  font-size: 0.7rem;\n  text-transform: uppercase;\n  letter-spacing: 0.08em;\n  color: var(--muted);\n  font-weight: 800;\n  margin: 0 0 13px;\n  display: flex;\n  align-items: center;\n  gap: 8px;\n}\n.panel-label .n {\n  display: inline-grid; place-items: center;\n  width: 18px; height: 18px; border-radius: 50%;\n  background: var(--accent); color: var(--accent-ink);\n  font-size: 0.66rem; font-weight: 800;\n}\n\n\u002F* ---------- layout helpers ---------- *\u002F\n.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }\n.row.between { justify-content: space-between; }\n.col { display: flex; flex-direction: column; gap: 10px; }\n.grow { flex: 1 1 0; min-width: 0; }\n.wrap-controls { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: flex-end; }\n.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }\n.field > .label, .ctl-label {\n  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em;\n  color: var(--muted); font-weight: 800;\n}\n\n\u002F* ---------- buttons ---------- *\u002F\n.btn {\n  font: inherit; font-weight: 650; font-size: 0.88rem;\n  cursor: pointer; user-select: none;\n  border: 1px solid var(--line);\n  background: var(--card); color: var(--ink);\n  padding: 9px 15px; border-radius: var(--radius-sm);\n  display: inline-flex; align-items: center; gap: 8px;\n  transition: background .15s ease, border-color .15s ease, transform .05s ease, color .15s ease;\n}\n.btn:hover { background: var(--line-soft); border-color: var(--muted); }\n.btn:active { transform: translateY(1px); }\n.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }\n.btn[disabled] { opacity: 0.45; cursor: not-allowed; }\n.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }\n.btn.primary:hover { filter: brightness(1.08); background: var(--accent); }\n.btn.good { background: var(--good); border-color: var(--good); color: #04140a; }\n.btn.bad  { background: var(--bad);  border-color: var(--bad);  color: #fff; }\n.btn.ghost { background: transparent; }\n.btn.sm { padding: 6px 11px; font-size: 0.82rem; }\n\n.btn-row { display: flex; flex-wrap: wrap; gap: 9px; }\n\n\u002F* Segmented control — a row of buttons where one is active (aria-pressed). *\u002F\n.seg { display: inline-flex; background: var(--card); border: 1px solid var(--line);\n  border-radius: var(--radius-sm); padding: 3px; gap: 3px; }\n.seg button {\n  font: inherit; font-weight: 650; font-size: 0.84rem; cursor: pointer;\n  border: none; background: transparent; color: var(--muted);\n  padding: 7px 13px; border-radius: 7px;\n  transition: background .15s ease, color .15s ease;\n}\n.seg button:hover { color: var(--ink); }\n.seg button[aria-pressed=\"true\"] { background: var(--accent); color: var(--accent-ink); }\n.seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }\n\n\u002F* Preset chips — worked-example shortcuts. *\u002F\n.presets { display: flex; flex-wrap: wrap; gap: 8px; }\n.presets .btn { background: var(--panel-2); }\n\n\u002F* ---------- toggle switch ---------- *\u002F\n.toggle { display: inline-flex; align-items: center; gap: 10px; cursor: pointer;\n  font-size: 0.88rem; font-weight: 600; user-select: none; }\n.toggle input { position: absolute; opacity: 0; width: 0; height: 0; }\n.switch { position: relative; width: 44px; height: 25px; border-radius: 999px; flex: none;\n  background: var(--line); border: 1px solid var(--line); transition: background .18s ease; }\n.switch::after { content: \"\"; position: absolute; top: 2px; left: 2px; width: 19px; height: 19px;\n  border-radius: 50%; background: #cfd6e4; transition: transform .18s ease; box-shadow: 0 1px 3px #0006; }\n.toggle input:checked + .switch { background: var(--good); border-color: var(--good); }\n.toggle input:checked + .switch::after { transform: translateX(19px); background: #fff; }\n.toggle input:focus-visible + .switch { outline: 2px solid var(--accent); outline-offset: 2px; }\n\n\u002F* ---------- range slider ---------- *\u002F\ninput[type=\"range\"] {\n  -webkit-appearance: none; appearance: none; width: 100%; height: 6px;\n  background: var(--line); border-radius: 999px; outline: none; cursor: pointer; margin: 8px 0;\n}\ninput[type=\"range\"]::-webkit-slider-thumb {\n  -webkit-appearance: none; appearance: none; width: 19px; height: 19px; border-radius: 50%;\n  background: var(--accent); border: 2px solid var(--panel); box-shadow: var(--shadow-sm); cursor: pointer;\n}\ninput[type=\"range\"]::-moz-range-thumb {\n  width: 19px; height: 19px; border-radius: 50%; background: var(--accent);\n  border: 2px solid var(--panel); box-shadow: var(--shadow-sm); cursor: pointer;\n}\ninput[type=\"range\"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }\n\n\u002F* ---------- text inputs \u002F selects ---------- *\u002F\ninput[type=\"text\"], input[type=\"number\"], input[type=\"search\"], select, textarea {\n  font: inherit; color: var(--ink); background: var(--card);\n  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 11px; width: 100%;\n}\ntextarea { font-family: var(--mono); font-size: 0.85rem; line-height: 1.6; resize: vertical; }\ninput:focus-visible, select:focus-visible, textarea:focus-visible {\n  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);\n}\n\n\u002F* ---------- status \u002F output \u002F log ---------- *\u002F\n.status {\n  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;\n  font-size: 0.9rem; font-weight: 600;\n  padding: 11px 14px; border-radius: var(--radius-sm);\n  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink);\n}\n.status.good { border-color: color-mix(in srgb, var(--good) 55%, var(--line)); }\n.status.warn { border-color: color-mix(in srgb, var(--warn) 55%, var(--line)); }\n.status.bad  { border-color: color-mix(in srgb, var(--bad) 55%, var(--line)); }\n.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); flex: none; }\n.dot.good { background: var(--good); } .dot.warn { background: var(--warn); }\n.dot.bad { background: var(--bad); } .dot.info { background: var(--info); }\n\n.output { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);\n  padding: 13px 15px; }\n.log { font-family: var(--mono); font-size: 0.8rem; line-height: 1.7; background: var(--card);\n  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 11px 14px;\n  max-height: 220px; overflow-y: auto; white-space: pre-wrap; }\n\n\u002F* ---------- code block + syntax tokens ---------- *\u002F\n.code {\n  font-family: var(--mono); font-size: 0.82rem; line-height: 1.7;\n  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);\n  padding: 13px 15px; overflow-x: auto; white-space: pre; tab-size: 2;\n}\n.code .tok-sel  { color: var(--accent); }\n.code .tok-prop { color: #86e29b; }\n.code .tok-kw   { color: #ff9bcb; }\n.code .tok-str  { color: #f0c674; }\n.code .tok-num  { color: #f0883e; }\n.code .tok-cmt  { color: var(--faint); font-style: italic; }\n.code .hl { background: color-mix(in srgb, var(--good) 22%, transparent); border-radius: 4px; padding: 0 3px; }\n\n\u002F* ---------- hint \u002F caption ---------- *\u002F\n.hint { font-size: 0.83rem; color: var(--muted); line-height: 1.55; margin: 10px 0 0; }\n.hint code { font-family: var(--mono); color: var(--ink); background: var(--line-soft);\n  padding: 1px 5px; border-radius: 5px; font-size: 0.86em; }\n.hint strong { color: var(--ink); }\n\n\u002F* ---------- banner (feature-support \u002F notices) ---------- *\u002F\n.banner {\n  display: none; margin-bottom: 14px; padding: 11px 14px; border-radius: 11px;\n  font-size: 0.85rem; line-height: 1.5;\n  color: var(--ink); background: color-mix(in srgb, var(--warn) 12%, var(--panel));\n  border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--line));\n}\n.banner.show { display: block; }\n.banner.info { background: color-mix(in srgb, var(--info) 12%, var(--panel));\n  border-color: color-mix(in srgb, var(--info) 45%, var(--line)); }\n.banner code { font-family: var(--mono); background: var(--line-soft); padding: 1px 5px; border-radius: 5px; }\n\n\u002F* ---------- misc atoms ---------- *\u002F\n.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 0.75rem; font-weight: 700;\n  padding: 3px 9px; border-radius: 999px; background: var(--line-soft); color: var(--muted); }\n.pill.good { color: var(--good); background: color-mix(in srgb, var(--good) 16%, transparent); }\n.pill.bad  { color: var(--bad);  background: color-mix(in srgb, var(--bad) 16%, transparent); }\n.mono { font-family: var(--mono); }\n.muted { color: var(--muted); }\n.big-num { font-family: var(--mono); font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; }\n\n\u002F* Optional theme toggle button (top-right). Wire it in JS if you want it. *\u002F\n.theme-btn { position: fixed; top: 12px; right: 12px; z-index: 20; }\n\n\u002F* ---------- responsive ---------- *\u002F\n@media (max-width: 560px) {\n  .panel { padding: 14px; }\n  .wrap-controls { gap: 14px; }\n  .btn { padding: 9px 13px; }\n}\n\n\u002F* ---------- reduced motion ---------- *\u002F\n@media (prefers-reduced-motion: reduce) {\n  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }\n}\n\n\n.cookie-box {\n    font-family: var(--mono);\n    font-size: 0.8rem;\n    word-break: break-all;\n    border: 1px solid var(--line);\n    border-radius: var(--radius-sm);\n    background: var(--panel-2);\n    padding: 10px 12px;\n    line-height: 1.5;\n  }\n  .cookie-box .seal-part { color: var(--muted); }\n  .cookie-box .sig-part { color: #38bdf8; }\n  .cookie-box.flipped .sig-part { color: #f87171; text-decoration: underline wavy; }\n  .visits-num {\n    font-family: var(--mono);\n    font-size: 1.6rem;\n    font-weight: 700;\n  }\n  select.pg-select {\n    font: inherit; background: var(--card); color: var(--ink);\n    border: 1px solid var(--line); border-radius: var(--radius-sm);\n    padding: 7px 10px;\n  }\n  .console-line { display: block; }\n  .console-line.err { color: #f87171; }\n  .console-line.ok { color: #34d399; }\n  .console-line.dim { color: var(--muted); }","(function () {\n  \"use strict\";\n\n  \u002F\u002F ---------- toy \"sealing\" model (NOT real crypto — see banner) ----------\n  function toyChecksum(str, secret) {\n    var h = 0;\n    var combined = secret + \"::\" + str;\n    for (var i = 0; i \u003C combined.length; i++) {\n      h = (h * 31 + combined.charCodeAt(i)) >>> 0;\n    }\n    return h.toString(16).padStart(8, \"0\");\n  }\n  function seal(dataObj, secret) {\n    var payload = btoa(JSON.stringify(dataObj));\n    var sig = toyChecksum(payload, secret);\n    return payload + \".\" + sig;\n  }\n  function unseal(cookie, secret) {\n    var parts = cookie.split(\".\");\n    if (parts.length !== 2) return { ok: false, reason: \"malformed cookie\" };\n    var payload = parts[0], sig = parts[1];\n    var expected = toyChecksum(payload, secret);\n    if (expected !== sig) return { ok: false, reason: \"signature mismatch — rejected\" };\n    try {\n      return { ok: true, data: JSON.parse(atob(payload)) };\n    } catch (e) {\n      return { ok: false, reason: \"payload unreadable — rejected\" };\n    }\n  }\n  function renderCookie(el, cookie, flipped) {\n    var parts = cookie.split(\".\");\n    el.className = \"cookie-box\" + (flipped ? \" flipped\" : \"\");\n    el.innerHTML = '\u003Cspan class=\"seal-part\">' + parts[0] + '\u003C\u002Fspan>.\u003Cspan class=\"sig-part\">' + parts[1] + '\u003C\u002Fspan>';\n  }\n\n  var APP_SECRET = \"appSecretA-32charsOrMoreInRealLife\";\n\n  \u002F\u002F ---------- tabs ----------\n  var tabSeg = document.getElementById(\"tabSeg\");\n  var tabs = {\n    roundtrip: document.getElementById(\"tab-roundtrip\"),\n    tamper: document.getElementById(\"tab-tamper\"),\n    secret: document.getElementById(\"tab-secret\"),\n  };\n  tabSeg.addEventListener(\"click\", function (e) {\n    var btn = e.target.closest(\"button[data-val]\");\n    if (!btn) return;\n    Array.prototype.forEach.call(tabSeg.querySelectorAll(\"button\"), function (b) {\n      b.setAttribute(\"aria-pressed\", String(b === btn));\n    });\n    Object.keys(tabs).forEach(function (k) { tabs[k].style.display = k === btn.dataset.val ? \"\" : \"none\"; });\n  });\n\n  \u002F\u002F ---------- Tab 1: normal round trip ----------\n  var visits = 0;\n  var cookieRT = null;\n  var visitsNum = document.getElementById(\"visitsNum\");\n  var cookieBoxRT = document.getElementById(\"cookieBoxRT\");\n  var statusRT = document.getElementById(\"statusRT\");\n\n  document.getElementById(\"visitBtn\").addEventListener(\"click\", function () {\n    var incoming = cookieRT ? unseal(cookieRT, APP_SECRET) : { ok: true, data: { visits: 0 } };\n    var data = incoming.ok ? incoming.data : { visits: 0 };\n    visits = (data.visits || 0) + 1;\n    cookieRT = seal({ visits: visits }, APP_SECRET);\n    visitsNum.textContent = String(visits);\n    renderCookie(cookieBoxRT, cookieRT, false);\n    statusRT.innerHTML = '\u003Cspan class=\"dot good\">\u003C\u002Fspan>\u003Cspan>Server unsealed the incoming cookie, read visits=' +\n      (data.visits || 0) + ', updated it, and resealed a fresh cookie for the next request.\u003C\u002Fspan>';\n  });\n  document.getElementById(\"resetBtn\").addEventListener(\"click\", function () {\n    visits = 0; cookieRT = null;\n    visitsNum.textContent = \"0\";\n    cookieBoxRT.textContent = '(none yet — click \"Send a request\")';\n    cookieBoxRT.className = \"cookie-box\";\n    statusRT.innerHTML = '\u003Cspan class=\"dot info\">\u003C\u002Fspan>\u003Cspan>No session cookie yet — the first request creates one.\u003C\u002Fspan>';\n  });\n\n  \u002F\u002F ---------- Tab 2: tamper ----------\n  var cookieTamper = seal({ userId: \"ada-01\" }, APP_SECRET);\n  var flipped = false;\n  var cookieBoxTamper = document.getElementById(\"cookieBoxTamper\");\n  renderCookie(cookieBoxTamper, cookieTamper, false);\n\n  document.getElementById(\"flipBtn\").addEventListener(\"click\", function () {\n    var chars = cookieTamper.split(\"\");\n    var dot = cookieTamper.indexOf(\".\");\n    var idx = Math.max(0, dot - 3); \u002F\u002F flip near the end of the payload, away from the separator\n    chars[idx] = chars[idx] === \"A\" ? \"B\" : \"A\";\n    cookieTamper = chars.join(\"\");\n    flipped = true;\n    renderCookie(cookieBoxTamper, cookieTamper, true);\n    document.getElementById(\"tamperLog\").innerHTML =\n      '\u003Cspan class=\"console-line\">One character changed. The cookie still LOOKS like a cookie — nothing about its shape reveals that it was edited.\u003C\u002Fspan>';\n  });\n  document.getElementById(\"resendBtn\").addEventListener(\"click\", function () {\n    var result = unseal(cookieTamper, APP_SECRET);\n    var log = document.getElementById(\"tamperLog\");\n    if (result.ok) {\n      log.innerHTML =\n        '\u003Cspan class=\"console-line ok\">✅ Unsealed successfully: ' + JSON.stringify(result.data) +\n        '\u003C\u002Fspan>\u003Cspan class=\"console-line dim\">(cookie was not tampered with)\u003C\u002Fspan>';\n    } else {\n      log.innerHTML =\n        '\u003Cspan class=\"console-line err\">❌ Unseal failed: ' + result.reason +\n        '\u003C\u002Fspan>\u003Cspan class=\"console-line dim\">Server treats this exactly like \"no session\" — it never reads a forged or guessed value.\u003C\u002Fspan>';\n    }\n  });\n  document.getElementById(\"resetTamperBtn\").addEventListener(\"click\", function () {\n    cookieTamper = seal({ userId: \"ada-01\" }, APP_SECRET);\n    flipped = false;\n    renderCookie(cookieBoxTamper, cookieTamper, false);\n    document.getElementById(\"tamperLog\").textContent = \"Flip a character, then resend, and compare to resending it untouched.\";\n  });\n\n  \u002F\u002F ---------- Tab 3: wrong secret ----------\n  var SECRETS = { A: APP_SECRET, B: \"a-totally-different-secret-value\" };\n  var cookieSecret = seal({ userId: \"ada-01\" }, SECRETS.A);\n  renderCookie(document.getElementById(\"cookieBoxSecret\"), cookieSecret, false);\n\n  document.getElementById(\"secretRun\").addEventListener(\"click\", function () {\n    var chosen = document.getElementById(\"secretSelect\").value;\n    var result = unseal(cookieSecret, SECRETS[chosen]);\n    var log = document.getElementById(\"secretLog\");\n    if (result.ok) {\n      log.innerHTML =\n        '\u003Cspan class=\"console-line ok\">✅ Unsealed with Secret ' + chosen + ': ' + JSON.stringify(result.data) + '\u003C\u002Fspan>';\n    } else {\n      log.innerHTML =\n        '\u003Cspan class=\"console-line err\">❌ Unseal failed with Secret ' + chosen + ': ' + result.reason +\n        '\u003C\u002Fspan>\u003Cspan class=\"console-line dim\">The cookie itself was never touched — only the secret used to open it changed.\u003C\u002Fspan>';\n    }\n  });\n})();",{"height":52,"autorun":17},520,{"slug":45,"title":54,"excerpt":55,"coverUrl":56,"vertical":57},"Nuxt 4.6 useSession: Server Sessions Without a Database","Nuxt 4.6 ships useSession and runtimeConfig.appSecret — real, sealed-cookie sessions with no database or session store. How it works, plus a cheat sheet.","\u002Fmedia\u002Fcovers\u002Fnuxt-weekly-usesession-sealed-sessions.png",{"slug":6},[59,63,67,71,75,79,83,87,91,95,99,103],{"slug":60,"name":61,"articles":62},"webdev","Webdev",144,{"slug":64,"name":65,"articles":66},"javascript","Javascript",117,{"slug":68,"name":69,"articles":70},"frontend","Frontend",87,{"slug":72,"name":73,"articles":74},"tutorial","Tutorial",55,{"slug":76,"name":77,"articles":78},"css","Css",44,{"slug":80,"name":81,"articles":82},"performance","Performance",23,{"slug":84,"name":85,"articles":86},"typescript","Typescript",19,{"slug":88,"name":89,"articles":90},"react","React",18,{"slug":92,"name":93,"articles":94},"browser","Browser",13,{"slug":96,"name":97,"articles":98},"node","Node",12,{"slug":100,"name":101,"articles":102},"programming","Programming",11,{"slug":104,"name":105,"articles":106},"accessibility","Accessibility",10]